url = 'https://www.iqiyi.com/v_19rrocwwbs.html?eventId=17546abaddbfa6db4329b33993d5c57f&bstp=3'

result = url[0:21]
print(result)

result = url[21:]
print(result)

result = url[:21]
print(result)

result = url[0:21:2]
print(result)







